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To work out the circumference of a circle, you multiply the diameter by Pi (approximately 3.141).

Circumference Calculator - Math Goodies

www.mathgoodies.com/calculators/circumference-calculator.html

Our circumference calculator lets you find the circumference of a circle after you enter its radius. For in-depth instruction on the circumference of a circle, try our ...

CIRCUMFERENCE CALCULATOR - Athropolis

www.athropolis.com/popup/c-circ2.htm

A quick and easy calculation of circumference from radius measurement.

Online Conversion - Circle Solver Calculator

www.onlineconversion.com/circlesolve.htm

Solve area, diameter, and circumference, circle equations.

math.about.com/library/blcirclecalculator.htm
The distance all around a circle is called the Circumference and is referred to in formulas as C. The distance from one side of the circle to the other is referred to as the Diameter of a circle and is identified as a d in formulas. The Radius of a circle is the distan... More »
By Deb Russell, About.com Guide

Circle Calculator - Calculator Soup

www.calculatorsoup.com/calculators/geometry-plane/circle.php

Calculate the area, circumference and radius of circles. Given any 1 known variable of a circle, calculate the other 2 unknowns. Circle formulas and geometric ...

Circle Calculator to Solve Area, Circumference, Diameter, Radius

www.free-online-calculator-use.com/circle-calculator.html

This free online geometry calculator will take one known circle measurement ( area, circumference, diameter, or radius) and calculate the other three. Plus, unlike ...

Ellipse Circumference Calculator - CSGNetwork.Com

www.csgnetwork.com/circumellipse.html

This calculator is designed to give the approximate circumference of any ellipse.

How to Calculate the Circumference of a Circle (with Examples)

www.wikihow.com/Calculate-the-Circumference-of-a-Circle

Circumference of a Circle Calculator ... Now plug it into the formula, plug π into your calculator for its numerical value, and solve for the circumference: C = πd; C  ...

Calculate the radius, diameter, circumference, area & volume of a ...

www.rkm.com.au/CALCULATORS/CALCULATOR-circle-sphere.html

Calculate the volume, surface area, circumference, diameter and radius of a sphere from any starting point ... all calculators / CIRCLE SPHERE CALCULATOR:

Popular Q&A
Q: Making a circumference calculator in PHP?
A: 1) What's the submit action in the form? 2) <input type="text" name="number">. 3) if(is_numeric($number) {. Submit was clicked, since the form was submitted. of... Read More »
Source: answers.yahoo.com
Q: How to Calculate Circumference in Feet.
A: The circumference of a circle equals the distance around the circle. To calculate the circumference of a circle in feet, you need to know either the radius or t... Read More »
Source: www.ehow.com
Q: How to Calculate Circumference in Inches.
A: 1. Locate the circle's center, and measure the length from its center to a point on its edge to find the radius. For an example, suppose the measurement is 5 in... Read More »
Source: www.ehow.com
Q: What is the formula for calculating circumference?
A: Circumference is the distance (length) around a circle. This is the answer to the equation you are trying to solve. The formula for circumference is pi x Diamet... Read More »
Source: www.chacha.com
Q: How to Calculate the Circumference of a Circle.
A: Three Methods: Circumference Help. Using the Diameter. Using the Radius. Whether you're doing craft work, putting fencing around your hot tub, or just solving a... Read More »
Source: www.wikihow.com